3100 HEUI Troubleshooting Vehicle Speed Circuit Test

System Operation

Schematic 1- Single Coil Speed Sensor with ECM Driving Speedometer (Recommended)


Schematic 2- Single Coil Sensor for ECM, Second Single Coil Sensor for Speedometer


Schematic 3- Dual Coil Vehicle Speed Sensor


Schematic 4- Electronic Control Providing Vehicle Speed to Engine ECM


Schematic 5- GM Vehicle Speed Connection Diagram


ECM Pin Locations


Diagnostic Codes


Functional Test

Leave a Reply

Your email address will not be published. Required fields are marked *